Bag manufacture



A. NOVICK BAG MANUFACTURE Feb. 21, 1939.

Filed May 28, 1935 3 Sheets-Sheet 1 INVENTOR.

m Abraham Nor/"(K11 BY ATTORNEY S Feb. 21, 1939.

' A. NOVICK BAG MANUFACTURE Filed May 28, 1955 3 Sheets-Sheet 2 INVENTQR. Abraham Nor/ck.

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A TTORNEYS.

Feb. 21, 1939. A NOVICK 2,147,856

BAG MANUFACTURE Filed May 28, 1935 3 Sheets-Sheet 3 Fig.9.

INVENTQR. Aim/1am Nor/ck.

A TTORNEYS.

Patented Feb. 21, 1939 UNITED STATES PATENT OFFICE 2,147,856 BAG MANUFACTURE ApplicationMay 28, 1935, Serial No. 23,846

10 Claims.

This invention relates to bag manufacture and has for its primary object to provide mechanism for manufacturing lined or plural ply bags from continuous webs of sheet material.

It is a feature of the invention that provision is made for feeding webs into superposed but laterally displaced relation and of means for simultaneously gumming corresponding margins of both webs at a single operation preparatory to folding the webs longitudinally into tubular form.

It is a further feature of the invention that provision is made for feeding the webs in separated relation together with means for cross gumming a side of one of the webs which faces the other web, and means for guiding the webs into juxtaposition to cause the webs to be united.

It is a further feature of the invention that the cross gumming means may be adjusted longitudinally of the path of web travel and relative to the web severing means so as to cause the adhesive union between the webs to occur in the finished bags adjacent the mouths thereof.

It is a further feature that provision is made of feeding means for drawing the webs from the source of web supply in advance of the tube forming mechanism, and of common means under the control of the webs for regulating'such feeding.

A further feature of the invention has to do with means for preventing lateral creep of the webs so as to assure correct alignment of the webs with one another and with the operating instrumentalities.

Features of novelty reside in the method of making bags, and in the mechanism for carrying out the method. I

Other objects and advantages will hereinafter appear.

In the drawings forming part of this specification,

Fig. 1 is a fragmentary, sectional view in side elevation, illustrating a portion of a bag making .machine embodying features of the invention;

' Fig. 1a is a small, diagrammatic view showing the web severing means;

Fig. 2 is a detail sectional view in side elevation illustrating particularly the transverse gumming means employed;

Fig. 3 is a fragmentary view in front elevation of one of the web guiding rollers; 7 Fig. 4 is a fragmentary plan view illustratin substantially the same portion of the machine shown in Fig. 1

Fig. 4a is a detail, sectional view illustrating features of the gumming bar drive;

Fig. 5 is a fragmentary, plan view showing the two superposed webs after they have been summed longitudinally and transversely, but bev fore they have been folded into tubular form;

Fig. 9 is a plan view, partly broken away, show 10 ing the finished bag.

- Webs i and 2 of paper, cellophane or other suitable bag making material are supplied from reels 3 and 6. The web I travels around rollers, 5, 6 and l and thence between feed rollers 8 and 9. This web supplies the material for the outer walls of the finished bags. The web 2 travels around a roller iii and roller 8 and thence between the rollers 8 and 9, the two webs coming into juxtaposed relation as they approach the bight of the rollers 8 and 9. The webs are not led into exact register but are so disposed that the web i has its left hand margin, as shown in Fig. '7, extending beyond the left hand margin of the web 2, and the web 2 has its right hand margin disposed to extend beyond the right hand margin of the web l.

The juxtaposed webs are drawn forward by other feeding mechanism including rollers llla and Nb and travel past a gumming disc 8 I which runs in a gum pot l2. The gumming disc I! has spaced flanges l3 and M, Fig. 4, for engaging the margins of the respective webs to apply longitudinal gum stripes l5 and 66 to them. After gumming, the webs travel over a guide roller l1 and thence respectively around rollers l8 and I9 carried by floating arms 20. The rollers 9- and IT guide the web to engage a narrow arc of the gumming disc II, but do not exert positive pressure against the disc.

The floating arms 20 form part of a clutch controlling mechanism for regulating the operation of the feed rollers 8 and 9. This feature, as well as the mounting and the drive of the gumming disc II, will be described more fully at a subsequent point. The floating arm performs the further function of causing the webs to bear against the gumming disc with substantially uniform, predetermined pressure.

From the roller l9 web 2 travels over a ribbed roller 20a. and thence around a roller 2|," to a roller 22. The web I takes a different path and It is important that the rollers 28a and 23 feed the webs in a true path. To this end provision is made for adjustably mounting said rollers. The mounting of roller 28a illustrated in Fig. 3 is the same as the mounting of the roller 23, and a description of it is applicable'to the mounting of roller 23 as well. The roller 28a has axial sockets in its end. One of these sockets receives a stub shaft 24 carried by a block 25 which is fixedly secured to a stationary frame member. 28 as by a screw 21. The other socket of the roller 20a is journalled upon a stub shaft 28 which is eccentrically carried by a shaft 28 journalled in a stationary frame member 38. The shaft 29 is provided with a hand wheel 3I for turning it and may be fixed in adjusted position by means of a set screw 32. Rotation of the hand wheel 3| is effective to change the angular disposition of the axis of the roller 20a and hence to alter the direction in which the roller tends to guide the web.

Provision is made of a cross'gumming device 33 for acting upon the inner face of the web I between the rollers 23 and 24. This device comprises an oscillating gumming bar 34 which applies a cross stripe 35 of gum to the web I at regular intervals. The gumming bar 34 is carried by crank arms 38 fast upon a transverse shaft 31. The shaft 31 is journalled in a frame 38 and also has fast upon it a crank arm 39 which carries a cam follower 40. The cam follower engages a cam 4I fast on a shaft 42 which is journalled in -the frame 38. Rotation of the cam 4| causes the gumming bar 34 to swing down into a gum pot 43 carried by the frame 38 and up into momentary contact with the lower face of the web, the operation being continuous.

The frame 38 is adjustably mounted upon a pair of stationary rack bars 44 which extend in the direction of web travel. The purpose of the adjustment is to enable the gum stripe to be applied at a greater or less distance from the point at which the severing of the individual blanks subsequently occurs. The machine is designed to make bags of different lengths as desired, and the adjustment of the cross gummer makes it possible .to locate the gum stripe always at a point which will be near the mouth of the finished bag.

The frame 38 is locked in adjusted positions by means of set screws 45 which are threaded through it and into engagement with the upper faces of the stationary racks 44. Adjustment is effected when the screws 45 are loosened, by means of a cross shaft 48 carried by the frame 38. The shaft 48 may be rotated by a handle, not shown, and has fast upon it pinions 41 which mesh with the racks 44.

Provision is made of a cross rod 48 for engaging the upper side of the web I adjacent the point at which the gumming bar 34 engages the lower side of the web. The rod 48 ,yieldingly opposes upward movement of the web in response to pressure exerted by the gumming bar, and thereby causes the gum to be properly applied to the web. The rod 48 is carried by crank arms 49 fast upon a shaft 58 which is freely journalled in the frame 38. The bar is urged downward by gravity and is limited in its downward movement by engagement of a stop arm 5| fast upon the shaft 58 with a stop pin 52 fixed upon the frame 38. The rod 48 may be swung upward and out of the way when desired and is arrested and held stationary by engagement of a stop arm 53 fast on the shaft 58 with the stop pin 52.

As the webs I and 2 are again brought into juxtaposition in passing around the roller 22, the

gum stripe 35 on the web I is pressed against the web 2, causing an adhesive union to be formed between the webs. The webs then pass together around a guide roller 54, and thence to the tube folding and severing instrumentalities 55 which are shown only fragmentarily because they are of known construction. The instrumentalities for completing the manufacture of the superposed webs into finished bags may be of the same construction as that illustrated in my pending application Serial #734,977 filed July 13, 1934 for Bag making machines. These instrumentalities include the rollers I00 and "lb for drawing the webs forward, means for folding them so that their margins overlap, knives 55a and 55b for severing the duplex tube thus formed into individual bag blanks, and means for forming the bottoms of the bags.

The cam shaft 42 has a sprocket 58 fast upon it, Fig. 4a, which is driven by a chain 51 from a sprocket 58 mounted upon a drive shaft 59. The sprocket 58 is located below and substantially midway of the path of adjustment of the cross gumming device 33. Provision is made of a takeup device for the chain to prevent the occurrence of slack. The take-up device comprises an arm 80 loosely journalled on the shaft 59, an idler sprocket 8| carried by the arm, and a spring 82 connected to the arm and to a stationary frame part for drawing the idler sprocket 8| against the chain.

The construction of the finished bag will be best understood from an examination of Figs. 5 to 9. When the superposed webs are folded from the condition of Fig. 7 into that of Fig. 8, two tubes are formed one within the other. A bag length is severed at"a point closely adjacent the cross gum stripe 35 so that in the finished bag the upper margins of the two blanks are secured to one another. This avoids the liability of accidentally loading the filling material into the space between the inner and outer plies of the bag. It also increases the strength and reduces the flexibility of the mouth portion of the bag. The mouth of the bag is less likely to be torn and this is particularly true where the bag is made of a material like Cellophane which can hardlybe torn at all so long as the edge remains intact but which affords practically no resistance to tearing once a rip or slit is started. If either ply has a slight rip or slit in it it is protected and guarded against tearing by its union with the other ply.

The machine is adapted to be used for making bags of different lengths and of different widths. In the part of the machines with which the present application is concerned the only adjustment for length which is required is the adjustment of the cross gummer which has been already described.

Provision is made for adjusting the longitudinal gumming discs II for different widths of tubes employed. The discs II are fixed upon a shaft 83 which has a longitudinal slot 84 formed therein. A bracket 85 embraces the shaft and forms a journal for the shaft. The bracket is received between collars 88 and 81 fast on the shaft. The bracket 85 also embraces a frame member 88 which extends parallel to the shaft. A set screw 88 threaded through the bracket may be turned into binding engagement with the frame member 88 to lock the shaft in adjusted position. The slotted end of the shaft 83 extends into a sleeve 10 which is provided internally with a driving pin II for driving the shaft 83 from the sleeve 18. The sleeve 18 is journalled in a bracket ans-25sec i2 fast on frame member 88 and is engaged at one side by a shoulder of the sleeve II. A driving gear '13 has a hub portion secured to the sleeve it by means of a set screw ll. The gear ll meshes with a gear 15 fast on the shaft of feed roller 9 and the gear 15 in turn meshes with a gear 16 fast on the shaft of feed roller 8, the gear ratios preferably being such that the gum? ming disc I] is driven at the same peripheral speed as the feed rollers l and 9.

The mechanism controlled by the floating arms it) for operating the feed rollers 8 and 9 is the same as the corresponding mechanism disclosed in my application Serial #734,977 referred to above. \Briefly this mechanism comprises a shaft 1'! to which the arm 20 is fixed. The shaft 11 has an upwardly extending thrust rod ll eccentrically connected to it. The rod 18 engages in a socket formed in one arm of a bell crank 19. The bell crank is mounted on a horizontal pivot disposed at right angles to a drive shaft 80. One arm of the bell crank extends upward and is bifurcated to form a clutch shifting fork ll.

The fork shifts one clutch member 02 toward and from the other clutch member 83 of a friction clutch. When the clutch members 82 and 83 are in coacting relation the shaft .0 acts through the clutch and a sprocket M which is fast on one of the clutch members to drive a chain 85, which chain in turn drives a sprocket 90 fast upon the shaft of feed roller 9. The rollers 8 and 9, when set into operation, advance the webs a little more rapidly than the webs are drawn forward and consumed by the subsequent operating instrumentalities. As a consequence the arms 20 gradually descend, causing the rod it to be thrust upward and to release the clutch.

When the rollers 8 and 9 are thus retarded or stopped the arm 20 is drawn upward by the consumption of the webs and the clutch is again made effective.

I have described what I believe to be the best embodiments of my invention. I do not wish,

however, to be confined to the embodiments shown, but what I desire to cover by Letters Patent is set forth in the appended claims.

I claim:

1. In a machine for making plural ply bags,

in combination, means for feeding a plurality of webs into juxtaposed but laterally staggered relation, and means for simultaneously gumming corresponding margins of the webs, means for securing said gumming means in different adjusted positions laterally of the machine, and

a means for driving the gumming means in all adjusted positions thereof.

2. In a machine for making plural ply bags, in combination, means for advancing a plurality of webs in spaced relation, mechanism for applying a gum stripe transversely to a face of one of the webs, and means for thereafter leading the webs into juxtaposed relation with the gum stripe disposed between 'them, said transverse gumming mechanism comprising means for causing the gum to be applied periodically and being adjustable longitudinally of themath v0f the web to control the location on the web at which the gum is applied.

3. In a machine for making plural ply bags, in combination, means for advancing a plurality of webs in spaced relation, mechanism for applying a gum stripe transversely to a face of one of the webs, and means for thereafter leading the webs into juxtaposed relation with the gum stripe disposed between them, said transverse gumming mechanism comprising an oscillating 'gumming bar, a cam for operating the bar,

means for rotating the cam, and means for adjusting the bar and cam in unison longitudinally of the path of the web to which the gum is applied.

4. In a machine for making plural ply bags, in combination, means for advancing a plurality of webs in,spaced relation, mechanism for applying a gum stripe transversely to a face of one of the webs, and means for thereafter leading the webs into juxtaposed relation with the gum stripe disposed between them, said transverse gummingmechanism comprising an oscillating gumming bar, a cam for operating the bar, means for rotating the cam and means for adjusting the bar and cam in unison longitudinally of the path of the web to which the gum is applied, and driving means for the cam including a driving train automatically maintaining an operative connection to the cam in all adjusted positions thereof. V

5. In a machine of the kind described, in combination, web feeding means, means comprising a reciprocating gumming bar for transversely gumming the web at intervals, means for supporting and guiding the web at a plurality of points at opposite sides of the point of gum application but at points remote therefrom so that the web bridges the gap between said supporting means and intersects the path of the gumming bar near one of the limits thereof, and a yielding pressure bar for engaging the web at the opposite side. from the gumming bar adjacent the point of gum application but slightly out of line therewith.

6. In a machine of the kind described, in combination, web feeding means, means comprising a reciprocating gumming bar for transversely gumming the web at intervals, means for supporting and guiding the web at a plurality of points at opposite sides of the point of gum application but at points remote therefrom so that the web bridges the gap between said supporting means and intersects the path of the gumming bar near one of the limits thereof, and a yielding pressure bar for engaging the web at the opposite side from the gumming bar adjacent the point of gum application but slightly out of line therewith, said pressure bar being movable between effective and ineffective positions, and means for arresting it in said positions.

7. In a machine for making plural ply bags, in combination, means for feeding a plurality of webs into juxtaposed but laterally staggered relation, and means for simultaneously gumming corresponding margins of the webs and comprising two telescoping members, a disc secured to one of said members and means for constantly applying a gum stripe transversely to 'a face of one of the webs, and means for thereafter leading the webs into juxtaposed relation with the gum stripe disposed between them, said trans-' verse gumming mechanism comprising a frame adjustable in the direction of advancement of thejwebs, means for securing said frame in an adjusted position, a gumming member movably mounted on said frame, means for applying gum guide rollers for supporting and guiding the web at a plurality of points, a transverse gumming member, power driven means for causing said gumming member to repeatedly cross the path of travel of the web between said guide rollers 5 and means for raising or lowering one side of the webs-at its region of contact with said gumming member and comprising a fixed bearing for one end of one of said guide rollers, an adjustable bearing for the other end thereof and means w for adjustably supporting said adjustable bearing.

ABRAHAM NOVICK. 

